Answer:
a║b
Step-by-step explanation:
.
18
Since he does 90 cars-----5 days
x cars--------1 day
we multiply 90 by 1 then over 5
Fact:
In other words, , the difference of two squares in the form and , could be factorized into .
In this question, the expression is the difference between two terms: and .
Hence:
Apply the fact that to factorize this expression. (In this case, whereas .)
Y = 6
X = 10
x1= -7 , x2= 1